Modulator-free, self-testing quantum random number generator

TL;DR

This paper introduces a practical self-testing quantum random number generator that operates securely with untrusted devices, providing real-time validation and achieving a rate of 450 kbps of certified randomness.

Contribution

It presents a novel self-testing QRNG capable of functioning with untrusted measurement devices and partially characterized sources, enabling real-time validation.

Findings

Achieved 450 kbps of certified random bits.

Operates securely with untrusted measurement devices.

Provides real-time validation of randomness.

Abstract

Quantum random number generators (QRNGs) use the inherent unpredictability of quantum mechanics to generate true randomness, as opposed to classical random number generators. However, ensuring the authenticity of this randomness still requires robust verification. Self-testing QRNGs address this need by enabling the validation of the randomness produced based on the observed data from the experiment while requiring few assumptions. In this work, we present a practical, self-testing QRNG designed to operate with an untrusted measurement device and a partially characterized source, allowing the user to check the adequate functioning of the setup in real time. Our experiment yields a rate of certified random bits of 450kbps